tree ca7600f9e865f6bfef8ce60a9c1d1ddd34acba96
parent d3f706f68e2fd93f1172fe7fd6f16ba70cc52b31
author Ido Schimmel <idosch@mellanox.com> 1480779906 +0100
committer David S. Miller <davem@davemloft.net> 1480811375 -0500

ipv4: fib: Allow for consistent FIB dumping

The next patch will enable listeners of the FIB notification chain to
request a dump of the FIB tables. However, since RTNL isn't taken during
the dump, it's possible for the FIB tables to change mid-dump, which
will result in inconsistency between the listener's table and the
kernel's.

Allow listeners to know about changes that occurred mid-dump, by adding
a change sequence counter to each net namespace. The counter is
incremented just before a notification is sent in the FIB chain.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>